I guess that makes sense, if she really expected to only get one vote and that being from tony, and knew the rest were full on board for tony, but the editing made it look like there would be a near even split between two alliances. Otherwise the one vote for Aubrey wouldn't matter because she would have ended up with more votes than Aubrey if it was going by what was shown. But then even tony voted for aubrey which was weird.
The expected votes from the editing were
Sandra=tony
Troyzan=tony
Hali=tony
Jeff=tony
Michaela=tony
Aubrey=sandra
Caleb=sandra
Malcolm=sandra
tony=sandra
The expected votes from the editing were
Sandra=tony
Troyzan=tony
Hali=tony
Jeff=tony
Michaela=tony
Aubrey=sandra
Caleb=sandra
Malcolm=sandra
tony=sandra